![]() Here we present a new deep-learning-based approach for recovering halo-free white-light diffraction phase images. In fact, the ray theory of light used in computer graphics is an approximation of this wave theory. In white-light diffraction phase imaging, when used with insufficient spatial filtering, phase image exhibits object-dependent artifacts, especially around the edges of the object, referred to the well-known halo effect. An optional Green Diffraction Laser is also available so that the effect of wavelength on the pattern can be measured. At a fundamental level, light behaves as a wave. The Diffraction Apparatus requires a Combination 1.2 m Track/Optics Bench individually or part of the Dynamics Cart and Track System. ![]() ![]() The light sensor is moved by hand over a 150 mm distance, tracing out the diffraction pattern. Both the light sensor and position sensor connect to your interface. Since it is optically based, without gears or racks, it has zero backlash.ĭata collection is performed by choosing a slit, directing the laser through the slit, and choosing an entrance aperture for the light sensor. The emitted waves are semicircular, and occur at t, time later. Each point on the wavefront emits a wave at speed, v. where s is the distance, v is the propagation speed, and t is time. The principle can be shown with the equation below: (6.2.6.1) s v t. This position sensor uses a precision optical encoder to measure translation with better than 50-micron resolution. Figure 1 shows a simple example of the Huygens’s Principle of diffraction. To measure position, the light sensor is mounted on a novel Linear Position Sensor. The light sensor has three ranges, allowing the study of fine details or gross features of patterns. Put up a barrier to explore single-slit diffraction and double-slit interference. In order to provide excellent spatial resolution, a selectable entrance aperture restricts the width of the pattern viewed by the High Sensitivity Light Sensor. Make waves with a dripping faucet, audio speaker, or laser Add a second source to create an interference pattern. The Linear Position Sensor and High Sensitivity Light Sensor completes the Diffraction Apparatus. These high-precision slits cast clean diffraction and interference patterns, ideal for quantitative matching of intensity vs. Slits are made by depositing metal film on glass, creating extraordinarily clean slits with fully opaque blocking areas. The included Red Diffraction Laser provides a clean monochromatic light source. Diffraction, and interference are phenomena observed with all waves. A light typically shines upon the water from above and. ![]() The Diffraction Apparatus lets students create, view, and measure diffraction and interference patterns. Light is a transverse electromagnetic wave. A ripple tank is a large glass-bottomed tank of water that is used to study the behavior of water waves. ![]()
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